@haahaaeb just use a free program called Fraps or bandicam and it will take screenshots for you. Make sure to take the screenshots at 1080p or higher resolution and max out all the graphics because you are only taking screenshots.

@haahaaeb Next time you're on GTA 5 press Win+Alt+G to open the Game Bar, utilized from the Xbox One. From here you can record videos, take screenshots, and adjust settings for both screenshot and video use.

Before all of that, you will be prompted with a message that says "Is this a game?". Click "Yes, this is a game.", then the Game Bar will fully open.